421340305525 has 24 divisors (see below), whose sum is σ = 538562902784. Its totient is φ = 326751796800.

The previous prime is 421340305489. The next prime is 421340305541. The reversal of 421340305525 is 525503043124.

It is not a de Polignac number, because 421340305525 - 2¹³ = 421340297333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 589737 + ... + 1091086.

Almost surely, 2^421340305525 is an apocalyptic number.

It is an amenable number.

421340305525 is a deficient number, since it is larger than the sum of its proper divisors (117222597259).

421340305525 is a wasteful number, since it uses less digits than its factorization.

421340305525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681141 (or 1681136 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 421340305525 its reverse (525503043124), we get a palindrome (946843348649).

The spelling of 421340305525 in words is "four hundred twenty-one billion, three hundred forty million, three hundred five thousand, five hundred twenty-five".